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Field Notes #8: Standing Watch

  • Writer: Heather McSharry, PhD
    Heather McSharry, PhD
  • Jun 4
  • 4 min read

Standing Watch

On the quiet machinery of survival

Field Notes is where I take one idea from the episode—something that feels like a hinge point—and follow it to see what it reveals. If you want the full story, you can read or listen to the episode here.


In the Margins

When people think about public health, they usually picture things with obvious health labels. Vaccination campaigns. Disease surveillance. Health departments. Epidemiologists tracking outbreaks.

They rarely picture a storm drain. Or a water treatment plant. Or an electrical substation. Or the refrigeration system quietly keeping insulin cold. Yet these systems spend every day doing something remarkably similar: standing between us and risk.

A water treatment plant keeps sewage out of drinking water. Storm drains carry away standing water before mosquitoes can breed. Refrigeration slows the growth of microbes in food. Utility crews keep electricity flowing to homes, pharmacies, and hospitals.

Most of the time, we don't think about any of this. Their success is measured by the absence of a story. Nobody celebrates a day when the drinking water remains free of contamination. Nobody notices the mosquito breeding site that never forms. Nobody posts online because their medication stayed at the proper temperature overnight. The better these systems work, the less visible they become.

Hurricanes have a way of changing that. They expose the systems that normally keep those risks at a distance. The power goes out. Roads flood. Drainage systems fail. Water systems are disrupted. And suddenly connections that seemed unrelated become obvious.

A power outage becomes a medication problem. A flooded road becomes an access-to-care problem. A failed sewer system becomes an infectious disease problem. The boundaries between infrastructure and health were never as distinct as they appeared.

What hurricanes reveal is not just the importance of these systems, but how rarely we recognize them as part of the larger machinery that keeps communities healthy. We tend to notice protection only when it disappears.

Public health systems work quietly in the background, preventing problems that never become headlines and risks that never become stories.

The sentinels standing watch.

Underlined

Some signs that a system may be functioning as healthcare, even if we don't usually call it that:

  • When its success is measured by things that don't happen

No outbreak. No contamination event. No emergency declaration.

  • When failure rapidly becomes a health problem

A power outage can become a medication problem. A drainage failure can become a mosquito problem. A water-system failure can become a disease problem.

  • When most people rarely think about it

The more reliable a system becomes, the more invisible it tends to be.

  • When maintenance feels less exciting than rescue

Preventing a crisis rarely receives the attention generated by responding to one.

  • When the benefits are distributed across entire communities

Everyone drinks the same water. Everyone relies on the same roads. Everyone benefits when infrastructure works.

These systems quietly shape who gets sick, who stays healthy, and how resilient a community remains when something goes wrong.

What It Points To

The systems that protect our health are often invisible until they break.

Outbreak Watch

Updates will only include information verified through credible reporting or official public health sources.

As of mid-morning, June 3, 2026:

  • Uganda's Bundibugyo Ebola outbreak has expanded to 15 confirmed cases, all linked through known contact networks, suggesting ongoing transmission but also effective contact tracing.

  • DRC health authorities substantially revised outbreak figures this week, reporting 321 confirmed Ebola cases and 116 remaining suspected cases under investigation. The change reflects hundreds of suspect reports that were ruled out after further investigation rather than a sudden improvement in transmission. Early outbreak numbers are often as much a measure of surveillance capacity as of the outbreak itself. ECDC's web page has most up to date links to all the Ebola updates: https://www.ecdc.europa.eu/en/ebola-outbreak-democratic-republic-congo-and-uganda

  • The MV Hondius Andes hantavirus cluster remains at 13 cases and 3 deaths. Several quarantined U.S. passengers have completed the first phase of monitoring and returned home symptom-free, while global follow-up continues.

  • Political controversy continues over the proposed U.S.-run Ebola quarantine facility in Kenya. Court challenges have temporarily halted the project while protests and local opposition continue to grow, with Kenyan courts now demanding greater transparency regarding the agreement.

Postscript

Thank you for subscribing. 🫶

One of the things I love about this show is that I'm always living in at least two timelines at once: finishing one episode while already deep into the next. As I write this, I'm working on next week's episode about alpha-gal syndrome—the unusual tick-borne condition that can leave people allergic to red meat. It's one of those stories that sounds fictional until you start digging into the science.

At the same time, I'm beginning to sketch out this year's Month of the Macabre lineup. I did that on a whim last year and had so much fun with it. There are still a lot of blank spaces in the plan, but they are coming together.

Over on Outbreak After Dark, we're also kicking around a few ideas for making the community feel a little more like an actual campfire gathering. We're exploring listening-party and gathering kits that would make it easier to share an episode with friends, family, or fellow science enthusiasts. It's still very much in the brainstorming stage, but I'm excited to see where it leads.

Until next week,

Heather






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